CITY OF COLUSA

COLUSA, CA · ~6,447 people served

Check your exact address → COLUSA overview

100

Excellent

PurityRadar safety score

PWSID

CA0610002

State

California

City

COLUSA

Population served

6,447

Primary source

Groundwater

Score history

No change since tracking began Jun 18, 2026.

Jun 18, 2026 · score 100 Jun 18, 2026 · score 100

2 score updates logged since tracking began Jun 18, 2026. Each future EPA re-score adds a point.

PFAS & contaminant readings

Latest detections from EPA’s UCMR5 monitoring (through May 2024). Levels in parts per trillion (ppt).

Lithium

41,900 ppt

limit —

No federal limit

Violations & enforcement

Violations on record

Unaddressed

Health-based

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Jun 2022. Official EPA record →

Monitoring · Lead & Copper Rule began Mar 2022 Resolved

Monitoring · Lead & Copper Rule began Jan 2022 Resolved

Monitoring · Lead & Copper Rule began Sep 2016 Resolved

Max contaminant level (MCL) · Total coliform health-based began Dec 1993 Resolved

Recent enforcement actions

State action · SOX Jun 2022
State action · SFJ May 2022
State action · SFJ Mar 2022
State action · SOX Jul 2019
State action · SFJ Oct 2016
State action · SOX Aug 1995
State action · SIA Jan 1994

This profile is built from EPA public records for system CA0610002 — SDWIS violations and UCMR5 PFAS sampling. The score is system-level and can’t account for your home’s plumbing (older pipes can add lead at the tap). For health decisions, check your exact address, read the utility’s Consumer Confidence Report, and confirm with your provider.